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Sheep graze near the Baiyinhua No. 1 open-cast coal mine in West Ujimqin Banner of Xilin Gol, Inner Mongolia, 10 May 2012. A new Greenpeace report shows that ten billion cubic meters of water will be consumed by 16 new coal fired power plants and mines in China planned for 2015, and trigger a severe water crises in the country’s arid Northwest. Photograph: Lu Guang/Greenpeace

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A Red-eyed frog is seen at Frog exhibition during the National Golden Frog Festival at the Summit Zoo in Panama City August 10, 2012. The Golden Frog is Panama's national frog and the Golden Frog Festival shall will be celebrated on August 14 amidst activities and events taking place from the August 10 till 19. Photograph: Carlos Jasso/Reuters

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Second mate Peter Brown holds a pilotless drone aircraft as he stands on the deck of the Sea Shepherd Conservation Society ship, Steve Irwin, off Australia's western coast in this handout picture taken on December 24, 2011. Hardline whaling opponents attempting to stop Japan's annual whale hunt in the Antarctic said on Sunday they had intercepted and photographed its whaling fleet using pilotless drone aircraft. Picture taken December 24, 2011. Photograph: Handout/Reuters